Influence of gamma-irradiation on thermally-induced mesoscopic gelation of degalactosylated xyloglucans

6533b82dfe1ef96bd1291e33

RESEARCH PRODUCT

Influence of gamma-irradiation on thermally-induced mesoscopic gelation of degalactosylated xyloglucans

Marta Walo Maria Antonietta Sabatino Clelia Dispenza Maria Rosalia Mangione Simona Todaro Donatella Bulone

subject

chemistry.chemical_classification Radiation Aqueous solution Materials science 60Co-gamma irradiation Size-exclusion chromatography Nanoparticle dynamic light scattering Polymer Xyloglucan chemistry.chemical_compound chemistry Dynamic light scattering Chemical engineering Drug delivery temperature responsive polymer Organic chemistry Molar mass distribution Settore CHIM/07 - Fondamenti Chimici Delle Tecnologie Co-60 gamma-irradiation Xyloglucan Temperature responsive polymers gel filtration chromatography

description

Thermoresponsive degalactosylated xyloglucans have been already proposed as in situ gelling scaffolds for tissue engineering, due to their reversible macroscopic thermal gelation at body temperature and biodegradability. The highly branched, hydroxyl group-rich molecular structure renders xyloglucans interesting raw materials also in the form of micro/nanoparticles for application as nanoscalar drug delivery devices in cosmetic and pharmaceutical formulations. Owing to their natural source, xyloglucans show high average molecular weight, broad molecular weight distribution and poor water solubility, as large and compact aggregates usually form via inter-molecular hydrogen bonding. Co-60 gamma-irradiation has been here applied to reduce the molecular weight. The aqueous solutions of irradiated xyloglucan were characterized by dynamic light scattering measurements and gel filtration chromatography. The aggregation kinetics at 37 C were studied by dynamic light scattering measurements to confirm the temperature-responsive behavior of this polymer even when dispersed in water at low concentration after gamma-irradiation. Irradiation dose-molecular properties relationship has been sought. (C) 2013 Elsevier Ltd. All rights reserved.

year	journal	country	edition	language
2014-01-01	Radiation Physics and Chemistry

https://doi.org/10.1016/j.radphyschem.2013.05.055

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